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DE-102024136148-B3 - Battery pack with removable electronic module

DE102024136148B3DE 102024136148 B3DE102024136148 B3DE 102024136148B3DE-102024136148-B3

Abstract

The invention relates to a battery pack (10) for supplying energy to a drive unit of a bicycle, wherein the battery pack (10) comprises: a battery module (14) with several battery cells (16) which are electrically connected to each other and an electronic module (12), wherein the electronic module (12) and the battery module (14) are detachably connected to each other. The invention further relates to a bicycle with a drive unit and a battery pack (10) and a method for mounting a battery pack (10).

Inventors

  • Anton Kanyshev
  • Dinko Morovic
  • Stjepko Peleh

Assignees

  • PORSCHE EBIKE PERFORMANCE GMBH

Dates

Publication Date
20260513
Application Date
20241204

Claims (11)

  1. Battery pack (10) for supplying energy to a drive unit of a bicycle, wherein the battery pack (10) comprises: - a battery module (14) with several battery cells (16) which are electrically connected to each other and - an electronic module (12), wherein the electronic module (12) and the battery module (14) are detachably connected to each other and wherein the electronic module (12) includes a connector (28) via which the battery pack (10) can be charged and discharged.
  2. Battery pack (10) according to the preceding claim, characterized in that the battery module (14) and the electronic module (12) are connected to each other by means of a plug connection.
  3. Battery pack (10) according to one of the preceding claims, characterized in that the electronic module (12) has as at least one first connector element (30a, 30b) a clamping element (32a, 32b) which is clamped to a corresponding second connector element (36a, 36b) of the battery module (14).
  4. Battery pack (10) according to one of the preceding claims, characterized in that the at least one clamping element (32a, 32b) has a u-shaped base body (42).
  5. Battery pack (10) according to one of the two preceding claims, characterized in that the clamping element (32a, 32b) has a continuous slot (48).
  6. Battery pack (10) according to one of the preceding claims, characterized in that the battery module (14) has as a second connector element (36a, 36b) at least one plate-shaped intermediate element (38a, 38b) connected to a circuit board (20a, 20b), which is clamped in the corresponding clamping element (32a, 32b).
  7. Battery pack (10) according to the preceding claim, characterized in that the intermediate element (38a, 38b) is positively locked against being pulled out against a plugging direction (S) on the battery module (14).
  8. Battery pack (10) according to one of the preceding claims, characterized in that the battery module (14) has as a second connector element (36c) an FPC connector (41) which connects a flexible circuit board (40) connected to the battery cells (16) to a first connector element (30c) in the form of a connector contact (34) on the electronic module (12).
  9. Battery pack (10) according to one of the preceding claims, characterized in that the connector (28) is materially bonded to the electronic module (12).
  10. Bicycle with a drive unit and a battery pack (10) according to one of the above Claims 1 until 9 .
  11. Method for assembling a battery pack (10) according to one of the above Claims 1 until 9 , characterized by the following steps: - providing an electronic module (12) with at least one first connector element (30a, 30b, 30c); - providing a battery module (14) with several battery cells (16), and at least one second connector element (36a, 36b, 36c); - establishing a plug connection between the electronic module (12) and the battery module (14) by relative movement along a plugging direction (S, S2), wherein the at least one first connector element (30a, 30b, 30c) is clamped to the corresponding second connector element (36a, 36b, 36c).

Description

The invention relates to a battery pack according to claim 1. The battery pack serves to supply energy to a drive unit of a bicycle. The invention further relates to a bicycle with such a battery pack according to claim 10 and a method for mounting such a battery pack according to claim 11. Battery packs for supplying energy to a bicycle's drive unit are well known in the prior art. Such bicycles with a drive unit and a battery pack are also called e-bikes or pedelecs. The drive unit is, in particular, an electric motor, which is connected to the battery pack for energy transfer. A connection between a battery pack and an electric motor is known from WO 2022/082 997 A1. A battery pack typically comprises a housing in which one or more battery cells are arranged. Several battery cells are usually combined to form a battery module and interconnected within the module. Furthermore, battery packs typically include an electronic module with electronics and a battery management system (BMS). The BMS serves, among other things, to monitor the voltage and temperature of the battery cells, as well as to control the load and charging of the battery cells and to balance the battery cells. The electronic module also usually has a (main) connector for charging and discharging the battery pack. The electronic module is typically welded to the battery module and/or connected via cables. If a defect occurs that requires opening the battery pack for repair, this will destroy the connection between the electronic module and the battery module, and consequently, both the electronic module and the battery module themselves. The fundamental object of the invention is therefore to provide a battery pack, as well as a bicycle with such a battery pack, which enables a simple and sustainable method of assembly and repair of the battery pack. A method is also to be provided that enables simple assembly of the battery pack with as few components as possible. The problem is solved according to the invention by the features of the independent claims. Further practical embodiments and advantages are described in connection with the dependent claims. A battery pack according to the invention serves to supply energy to a drive unit of a bicycle. The battery pack comprises a battery module with several battery cells. The battery cells are electrically connected to one another. The battery module has several battery cells, and in particular between 20 and 35 battery cells, preferably 24 or 33 battery cells at 3.6 V each. The battery cells are connected in a configuration of 11s3p, 12s2p, or 13s1p. In an 11s3p configuration, 11 battery cells are connected in series in 3 parallel strings. In a 12s2p configuration, 12 battery cells are arranged in series in each of two parallel strings (12s2p). The arrangement of the battery cells in the 12s2p configuration is particularly in two layers, each with two rows of battery cells, each containing 4 batteries. The battery cells are particularly cylindrical in shape. The battery module is particularly a battery module with a supply voltage in the low-voltage range. The nominal voltage of the battery module is in particular below 60 V and is preferably between 35 and 45 V and preferably 39.6 V or 43 V. The battery pack comprises a battery module and an electronics module. The electronics module includes, in particular, a battery management system (BMS). The BMS, in a known manner, monitors the battery cells, especially their state of charge (cell voltage) and temperature, controls the battery cells, and protects them. The electronics module also includes a connector through which the battery pack can be charged and discharged. The cell voltage of the interconnected battery cells is provided via this connector. The electronic module comprises, in particular, at least one circuit board on which the BMS is implemented and/or the connector is located. The electronic module may, in particular, comprise at least one further circuit board, especially for the implementation of a human-machine interface (HMI), specifically for displaying and reading the state of charge of the battery pack. The battery module and the electronics module are both compact units. They are detachably connected. "Detachably" in this context means that the electrical and/or mechanical connection between the battery module and the electronics module can be broken without damage and re-established repeatedly. This is possible. In particular, the battery module and the electronic module are connected to each other by force-fit and/or form-fit, and not by material-fit. The detachable connection, which will be described in more detail below, allows the battery module and the electronics module to be separated again after connection without damaging the components. The individual components remain undamaged and reusable. Furthermore, the avoidance of permanent (material-bonded) connections and, in particular, cables, significantly simplifies